Andi Kleen b45c6e76bc kernel/signal.c: fix kernel information leak with print-fatal-signals=1 ... When print-fatal-signals is enabled it's possible to dump any memory reachable by the kernel to the log by simply jumping to that address from user space. Or crash the system if there's some hardware with read side effects. The fatal signals handler will dump 16 bytes at the execution address, which is fully controlled by ring 3. In addition when something jumps to a unmapped address there will be up to 16 additional useless page faults, which might be potentially slow (and at least is not very efficient) Fortunately this option is off by default and only there on i386. But fix it by checking for kernel addresses and also stopping when there's a page fault. Signed-off-by: Andi Kleen <ak@linux.intel.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Oleg Nesterov <oleg@redhat.com> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2010-01-11 09:34:05 -08:00
..
gcov
irq	genirq: Convert irq_desc.lock to raw_spinlock	2009-12-14 23:55:33 +01:00
power	vt: introduce and use vt_kmsg_redirect() function	2009-12-15 08:53:28 -08:00
time	Revert "time: Remove xtime_cache"	2009-12-22 14:10:37 -08:00
trace	Merge branch 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2009-12-31 11:52:01 -08:00
.gitignore
acct.c	bsdacct: fix uid/gid misreporting	2009-12-15 08:53:10 -08:00
async.c
audit.c
audit.h
audit_tree.c	fix more leaks in audit_tree.c tag_chunk()	2009-12-19 09:27:43 -08:00
audit_watch.c
auditfilter.c
auditsc.c	Sanitize f_flags helpers	2009-12-22 12:27:34 -05:00
backtracetest.c
bounds.c
capability.c
cgroup.c	cgroups: fix 2.6.32 regression causing BUG_ON() in cgroup_diput()	2010-01-11 09:34:05 -08:00
cgroup_freezer.c
compat.c
configs.c
cpu.c	sched: Fix set_cpu_active() in cpu_down()	2009-12-16 19:01:53 +01:00
cpuset.c
cred-internals.h
cred.c
delayacct.c
dma.c
exec_domain.c
exit.c	do_wait() optimization: do not place sub-threads on task_struct->children list	2009-12-17 15:45:31 -08:00
extable.c
fork.c	do_wait() optimization: do not place sub-threads on task_struct->children list	2009-12-17 15:45:31 -08:00
freezer.c
futex.c	rtmutes: Convert rtmutex.lock to raw_spinlock	2009-12-14 23:55:33 +01:00
futex_compat.c
groups.c
hrtimer.c	hrtimers: Convert to raw_spinlocks	2009-12-14 23:55:34 +01:00
hung_task.c
hw_breakpoint.c	Merge branch 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2009-12-31 11:52:01 -08:00
itimer.c
kallsyms.c
Kconfig.freezer
Kconfig.hz
Kconfig.locks
Kconfig.preempt
kexec.c	Merge branch 'for-33' of git://repo.or.cz/linux-kbuild	2009-12-17 07:23:42 -08:00
kfifo.c	kfifo: add record handling functions	2009-12-22 14:17:56 -08:00
kgdb.c
kmod.c	kmod: fix resource leak in call_usermodehelper_pipe()	2010-01-11 09:34:04 -08:00
kprobes.c	kprobes: Fix distinct type warning	2009-12-28 10:25:31 +01:00
ksysfs.c	kexec: premit reduction of the reserved memory size	2009-12-16 07:20:13 -08:00
kthread.c	sched: Move kthread_bind() back to kthread.c	2009-12-16 19:01:57 +01:00
latencytop.c
lockdep.c	locking: Convert __raw_spin* functions to arch_spin*	2009-12-14 23:55:32 +01:00
lockdep_internals.h
lockdep_proc.c
lockdep_states.h
Makefile
module.c	modules: Skip empty sections when exporting section notes	2010-01-06 01:11:29 -08:00
mutex-debug.c
mutex-debug.h	locking: Implement new raw_spinlock	2009-12-14 23:55:32 +01:00
mutex.c
mutex.h
notifier.c
ns_cgroup.c
nsproxy.c
panic.c	Merge git://git.infradead.org/mtd-2.6	2009-12-16 10:23:43 -08:00
params.c	tree-wide: convert open calls to remove spaces to skip_spaces() lib function	2009-12-15 08:53:32 -08:00
perf_event.c	Merge branch 'perf-fixes-for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2009-12-31 11:56:24 -08:00
pid.c	pid: reduce code size by using a pointer to iterate over array	2009-12-16 07:20:12 -08:00
pid_namespace.c
pm_qos_params.c
posix-cpu-timers.c
posix-timers.c
printk.c	printk: fix new kernel-doc warnings	2009-12-17 15:45:32 -08:00
profile.c
ptrace.c
rcupdate.c
rcutiny.c
rcutorture.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu	2009-12-14 09:58:24 -08:00
rcutree.c
rcutree.h
rcutree_plugin.h
rcutree_trace.c
relay.c	const: constify remaining pipe_buf_operations	2009-12-16 07:20:05 -08:00
res_counter.c
resource.c	resources: fix call to alignf() in allocate_resource()	2009-12-21 10:42:29 -08:00
rtmutex-debug.c	sched: Convert pi_lock to raw_spinlock	2009-12-14 23:55:33 +01:00
rtmutex-debug.h
rtmutex-tester.c
rtmutex.c	rtmutes: Convert rtmutex.lock to raw_spinlock	2009-12-14 23:55:33 +01:00
rtmutex.h
rtmutex_common.h
rwsem.c
sched.c	sched: Revert 738d2be, simplify set_task_cpu()	2009-12-23 10:04:10 +01:00
sched_clock.c	sched: Fix cpu_clock() in NMIs, on !CONFIG_HAVE_UNSTABLE_SCHED_CLOCK	2009-12-15 09:04:36 +01:00
sched_cpupri.c	sched: Convert cpupri lock to raw_spinlock	2009-12-14 23:55:33 +01:00
sched_cpupri.h	sched: Convert cpupri lock to raw_spinlock	2009-12-14 23:55:33 +01:00
sched_debug.c	sched: Convert rq->lock to raw_spinlock	2009-12-14 23:55:33 +01:00
sched_fair.c	sched: Remove the cfs_rq dependency from set_task_cpu()	2009-12-16 19:01:58 +01:00
sched_features.h
sched_idletask.c	sched: Restore printk sanity	2009-12-20 19:05:02 +01:00
sched_rt.c	sched: Add pre and post wakeup hooks	2009-12-16 19:01:58 +01:00
sched_stats.h
seccomp.c
semaphore.c
signal.c	kernel/signal.c: fix kernel information leak with print-fatal-signals=1	2010-01-11 09:34:05 -08:00
slow-work-debugfs.c
slow-work.c
slow-work.h
smp.c	Merge branch 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2009-12-15 09:02:01 -08:00
softirq.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu	2009-12-14 09:58:24 -08:00
softlockup.c
spinlock.c	locking: Cleanup the name space completely	2009-12-14 23:55:33 +01:00
srcu.c
stacktrace.c
stop_machine.c
sys.c	Merge branch 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2009-12-19 09:47:34 -08:00
sys_ni.c
sysctl.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6	2009-12-17 16:58:26 -08:00
sysctl_binary.c	SYSCTL: Print binary sysctl warnings (nearly) only once	2009-12-23 21:00:20 +01:00
sysctl_check.c
taskstats.c
test_kprobes.c
time.c	Revert "time: Remove xtime_cache"	2009-12-22 14:10:37 -08:00
timeconst.pl
timer.c	timers: Remove duplicate setting of new_base in __mod_timer()	2009-12-17 01:30:49 +01:00
tracepoint.c
tsacct.c
uid16.c
up.c
user-return-notifier.c
user.c
user_namespace.c
utsname.c
utsname_sysctl.c
wait.c
workqueue.c